MyVocabulary.com includes these SUFFIXES as a part of your Root-A-Week program! Suffixes modify and extend meaning. Use 9 suffix puzzles at grade level for each of these 9 "important" suffixes. "-ARIUM" words: Aquarium, Auditorium, Columbarium, Crematorium, Planetarium, Sanatorium, Solarium, Terrarium Suffix -ARIUM and -ORIUM mean "a place for."